some potentially nice trait stuff

src/widget/position/span.rs

@@ -152,32 +152,32 @@ impl Span {
     }
 }
 
-pub struct SpanBuilder<State, const LEN: usize, Wa: WidgetArrLike<State, LEN, Tag>, Tag> {
-    pub children: Wa,
+pub struct SpanBuilder<Children, Rsc, Tag, GTag> {
+    pub children: Children,
     pub dir: Dir,
     pub gap: f32,
-    _pd: PhantomData<(State, Tag)>,
+    _pd: PhantomData<(Rsc, Tag, GTag)>,
 }
 
-impl<Rsc, const LEN: usize, Wa: WidgetArrLike<Rsc, LEN, Tag>, Tag> WidgetFnTrait<Rsc>
-    for SpanBuilder<Rsc, LEN, Wa, Tag>
+impl<Children: IntoWidgetVec<Rsc, Tag, GTag>, Rsc, Tag, GTag> WidgetFnTrait<Rsc>
+    for SpanBuilder<Children, Rsc, Tag, GTag>
 {
     type Widget = Span;
 
     #[track_caller]
     fn run(self, rsc: &mut Rsc) -> Self::Widget {
         Span {
-            children: self.children.add(rsc).arr.into_iter().collect(),
+            children: self.children.into_vec(rsc),
             dir: self.dir,
             gap: self.gap,
         }
     }
 }
 
-impl<State, const LEN: usize, Wa: WidgetArrLike<State, LEN, Tag>, Tag>
-    SpanBuilder<State, LEN, Wa, Tag>
+impl<Children: IntoWidgetVec<Rsc, Tag, GTag>, Rsc, Tag, GTag>
+    SpanBuilder<Children, Rsc, Tag, GTag>
 {
-    pub fn new(children: Wa, dir: Dir) -> Self {
+    pub fn new(children: Children, dir: Dir) -> Self {
         Self {
             children,
             dir,